Blue: This shape would look/bake better. (Or maybe it's what you already have and it's just hard to tell?)

Purple: Even with a normal this still looks too flat, bevel it out so that it looks like it has some depth?

Pink: Baking mistakes? (Use more polygons?)

Otherwise looks pretty fine, would be p nice to have another modeler who can make good content here!

e: actually if this is an object that's going to tile a lot you should probably just trash all the details on the bottom of the wall, they'll make things really noisy really quickly if they're seen over and over.